Welt-attaching mechanism



Sept. 11, 1928.

J B HADAWAY WELT ATTACHING MECHANISM Filed May 22, 1922 s Shets Sheet 2Sept. 11, 1928.

J. B. HADAWAY WELT ATTACHING MECHANISM Filed May 22. 1922 6 Sheets-Sheet3 Sept. 11, 19221 1,683,666 J. B. HADAWAY WELT ATTACHING MECHANISM FiledMay 22. 1922 6 Sheets-Sheet 4 Sept. 11, 1918.

J. a. HADAWAY mam ATTAGHING uncamrsu Filed May 22, 1922 cs-Sheet 5 Sept.11, 1928.

1,683,666 J. B. HADAWAY WELT ATTACHING MECHANISM Filed May 22. 1922 6Sheets-Sheet 6 Patented Sept. 11, 1928.

UNITED STATES PATENT OFFICE.

JOHN B. HADAWAY, or swnnrsco'rr, MASSACHUSETTS, ASSIGNOR To witnessesMACHINERY CORPORATION, or rA-rnnson, new JERSEY, n condemns or JERSEY.

wnLT-A'rTAoH-Iner MECHANISM.

Application filed May22, 1922. Serial No. 562,615.

In attaching welts or similar narrow strips to shoes it has beencustomary to treat as by slashing those portions of the welt which areto be bent around sharply curved por v tions of the shoesuch as the toein order that the welt may lie'flat or may be more readily brought intothe plane of the sole to which it is attached. Inthe case of Weltscwingmachines for securing together the welt upper and insole of weltedshoes it has been proposed to utilize various forms and arrangements ofwelt slashing mechanism for slashing the welt before it reaches thestitch 12 01111 ing devices and thus facilitate the attaching of thewelt about the toe or other sharply curved contour and also thesubsequent beating out of the welt to bring it into the plane of theinsole. These mechanisms are either operated to slit the welt throughoutits attached length, which is objectionable, or have depended on thecareful attention and skill of'thc operator to throw them into or intoand out of operation at the proper point in the welt attachingoperation, which also objectionablev I The present invention eliminatesthe objCCtlOIlitblG features of prior constructions by the provision ofmeans for treating the welt to facilitate its lateral bending, which,

is so constructed and arranged that it is ren dcred active instartingthe machine to treat that portion of the welt'only which is laid about apro-determined contour of the shoe by the attaching mechanism. The welttreating mechanism is preferably arranged at a distance in advance ofthe attaching point corresponding to the length of welt which will heattachedbcforereaching that part of the shoe with which the treatedportion of the welt is to register, sincethis permits the simultaneousstarting of welt: treating and attaching operations. .The welt treatingmechan sm may, therefore, beso connected with the starting mechanism ofthemac'hine that it star s its operation at the proper point on the weltwithout attention or care on the part of the operator'and continues tooperate untilithe desired {ire-determined lengthof welt has beenoperated upon, when its operation ceases. Sinc'ethe length of welt whichis attached before reaching that part of the with which the treatedportion of the welt should register varies with different lengths ofshoesthc welt treating mechanism is preferably so mounted that itsdistance from the attaching point may be varied in accordance with thelength of shoe to be operated on. The length of that port-ion of thewelt which should be treated also varies and means is therefore providedfor adjusting thewelt treating mechanism to operate during varyingperiods.

In embodying the invention in an inseam sewing machineto' slash thatpart of the welt which is laid about the toe of the shoea welt slashingmechanism constructed to make a pre-determined number of slashes andthen stop is preferably connected with the starting treadle of themachine to be started when the treadle is operated to start the sewing.The slashing which is thus started without imposing any additional dutyupon the operator continues until the slashing mechanism iszuitomatically stopped by a n cchanismwhich may be set to throw theslashing-mechanism out of operation afterany desired number -of cyclesof the sewing mechanism. Means is also providedfor rendering themechanism The preferred form of the invention is shown in the drawingsapplied to a machine for sewingthe inseam of a welt shoe. In thesedrawings Fig. 1 is a front view of the ma chine; Fig. 2 is a side viewlooking toward the left in Fig. 1, a part of the standard being brolfenout; Fig. 3 is a plan view of the welt slashing mechanism F g. 4 1$ asectional detail view on a horizontal plane passing through the axis ofthe actuating shaft 'of the slashing mechanism F1g. 5 1s a'sect onalelevation on line 5 of Fig. 3; Fig.- 6 s asinnlar view of a part of themechanism showingthe parts in a different positlon; Fig. 7 1s a detailedelevation showing the" welt clamping and slashing devices; Fig. 8 is afront elevation of the welt clamping and slashing devices; Fig. 9 is asimilar view'showing the parts in a different position; Fig.1!) is aside elevation of the parts shown in Fig. i and Figs. 11 and 12 areviews similar to Fig s. 10 and 9 respectively, showing devices forstretching instead of slashing the outer edge of the welt.

In the drawings the invention is shown applied to the welt sewingmachine 'for attaching a welt and'upper to the insole of a welt shoewhich is shown and described in Patent No..l,.260,527, March 26, 1918.This machine is provided with the usual stitch forming and work feedingdevices, including a channel guide 2, an awl 4, a looper 6 and a weltguide 8. The machine is provided w th driving and stopping mechanismwhich may be the same in construction as that shown and described inPatent No. 1,0995326, June 9, 1914: which is controlled by a treadle 10as is usual in this type of machine.

The mechanism for treating the welt shown in Figs. 1 to 10 eonsistsiof awelt slashing mechanism which, when rendered active, op

crates on the welt during a pro-determined number of stitch forming andwork feeding cycles and then becomes inactive and remains so until againthrown into operation. It is arranged to act on the welt between thewelt Y with the size of the shoe to be sewed.

guide 8 and the welt guiding and measuring roll 12 and at a distancefrom the sewing point substantially equal to the distance from the heelbreast or the point where the inseam begins to the toe portion of theshoe. The welt supporting and slashing devices of the mechanism arecarried on a slide 14 mounted on a fixed guide 16 for adjustment towardor away f rom the sewing point in accordance The slide may be readilyadjusted to position the weltslashing devices at the proper distancefrom the sewing point by means of an adjusting lever 18, the upper endof which s provided with a segment 20 engaging a rack 22 on the slideandthe other end of which is provided with a spring pressedpin 24: ofcommon construction arranged to engage any one of series of holes in afixed plate 26.

The welt passes from the guide roll 12 about a guide 28 and thence overa support 30 which is secured to the slide 1i and is provided with edgegagesembraeing the welt. The weltis clamped to the support while heingoperated upon by two arms which project forward from a'yoke-shaped clamplever 32 mounted on a shaft 34 on the slide. The

and releasethewelt through a lever 36 mounted on the shaft 34 andengaging the rear end of a spring pressed plunger 38 mounted in theclamp lever. The lever is held in engagementwith the rear end of theplunger by a spring 40 and the rearward movement of the plungerislimited by the stop nuts 42. The

lever 36 is rocked through toggle links 44 connected with areciprocating actuating bar 46 by the pivot pin 48;. The spring 40normally connects the levers 36 and 32 so that they move together; NVhenthe toggle is straightened the levers will move together until thec'lampinglever engages the welt, after which the plunger 38 will yieldto permit continued a carrier lever 56 at an inclination to the welt.

The carrier lever is pivoted on a bracket 58 which is adj ustablysecured by a set screw (50 to the forwardly projecting arm of a lever 62which is mounted on the shaft 34. The upper end of the knife carrierlever is normally held in engagement with a stop (it on the brackot 58by a spring 66. The lever (32 is rocked from the actuating bar46 througha roll 68carried by the bar and engaging a cam slot 70 in the rear endof the lever. The cam slot is so shaped that the knife is held in itsupper position during the forward movement of the bar which brings theclamp lever into engagement with the welt, after-which the continuedmovement of the bar rocks the lever to bring the knife into engagementwith and force it into the welt. During the first part of the movementof the lever (12 the knife carrier lever 56 remains in engagement withengagement with the cam by a spring 78.

The shaft is driven through a gear loosely mounted on the shaft andcontinuously rotated during the sewing from the cam shaft 82 of thesewing machine through gearing 84. When the starting treadle is operatedby the operator to start the sewing machine the driving gear 80 istemporarily connected with the shaft 7 2 through a clutch sleeve 86keyed to slide on the shaft and provided with a clutch lug 88 adapted toengage a similar lug 90 on the hub of the gear. The clutch is normallyheld out of engagement with the gear a ainst the pressure of a spring 92by a stop bolt 94:, the inner end of which is arranged to engage a stopcam 96 on the clutch. The stop bolt is normally held with its inner endin engagement with the cam 96 as indicated in Figs. 3 and 5 by a spring98. The stop'bolt is withdrawn to permit the clutch to engage thedriving gear and thus throw the slashing mechanism into operationthrough a lever 100, the upper end of which engagesa collar 102 on thebolt. The lever is connected with a tripping lever 104 by a latch 106which-is pivoted on the lever 104 Inn anism. Then the treadle isdepressed the tripping lever is rocked into the position in dicated inFig. 6, thus withdrawing the locle ing bolt to start the slashingmechanism. The final downward movement imparted to the trip lever fromthe treadle brings the tail of the lat-ca 106 into engagement with thestop screw 11 1 and disengages the latchfrom the lever 100 so that thelever is immediately returned to initial positionby the spring 116 whereit does not interfere with r the return of the stop bolt tostopping-position. The immediate return of the stop bolt is prevented atthis time, however, by a timing latch 118, which rides on the collar 102as indicated in 5 and drops down back of the collar as indicated in Fig.6 when thestop bolt is withdrawn. The timing latch holds the stop boltin retracted position until the cam shaft of the sewing machine and theshaft 7 2 have made a number of revolutions determined by a timingmechanism which disengages the timing latch and permit-s the stop boltto return to stopping position. V

The timing mechanism comprises a sleeve 120 loosely mounted on the shaft72 and held in initial position by a coil spring 122, one end of whichis connected with the sleeve,- and the otherend of which is connected toa fixed clamp 12 1 igs. 4 and 6). The sleeve provided with a ratchetwheel 126 through which it is intermittently advanced, and its initialposition is determined by a lug 128 projecting from the ratchet wheel,and a lag 130 projecting from the side of an adjustable gear 132 mountedon the shaft 7 2 at the end of the sleeve. The pawl 13% for engaging theratchet wheel 126 and intermittently advancing the timing sleeve ispivoted to the upper end of a pawl carrying arm 136, the lower end ofwhich is providedwith a hub 138 pivotally supported upon the fixed plate140. The hub carries a second upwardly projecting arm142, the upper endof which carries a roll 144 engaging a cam 146 which is keyed to theshaft 72. The roll is held in engagement with the cambya spring 148,acting on an arm 150 which projects from the hub138. The pawl 134 isnormally held out of engagement with the ratchet wheel by a pin 15 2projecting laterally from an arm 154i projecting fromthe sleeve 156which forms the hub of the timing stop 118. The arm 15 1 also carriesaspring ressed stop pawl 158 which is normally he clout of engagementwith the teeth of the ratchet wheel 126 as indicated in Fig. ,5. Thetiming sleeve is provided with a cam 1:60 arranged to engage a roll 162on the arm 15% and :to raise this-arm and the timing latch 118 into theposition 1-, dicated in Fig. V

lVhen the stop bolt is withdrawnin start ingthe machine to start theslashing mechani-sm the timing latch 118'a id the connected arm 15stare'swung down into the position indicated in Fig.6 by the spring 116%.This brings the timing latch into position to pre vent the return of thestop'bolt' and also the roll 162 and lifts the arm 154l and tim-- inglatch back to initial position. lVhen this w occurs the stop bolt willreturn to stopping position and will bring the collar 162 under s thetiming latch where it will support the latch and arm 15 1 1n theirraised positions.

The lifting of the arm 154E disengages the ac-,

tuating pawl and stop pawl-from the ratchet wheel so that the ratchetwheel and timing sleeve are returned to initial position by the coilspring 122. The number of cycles during which thesla'shing mechanismcontinues in action will depend upon the initial of the lugs 130 and128.

To enable the lug 136 to be readily adjusted to vary the number ofcycles during which positions the slashing mechanism continues in actionthe gear 132 on which the lug 130 is formed is engaged by a segment 166secured tothe i inner end of a shaft 168, the outer end of which isconnected by beveled gears 170 with the rear end ofa shaft 172. Theforward end of the shaft carries an adjusting lever 174 which'may beadjusted to bring a pin 176 carried therebyinto engagementwith any oneof a series of holes in an index plate 17 8 and thus vary the positionof the lug 130 so that the slashing mechanism will continue in actionduring the number of cycles indicated by the adjustment of the lever.

In order that the operator mayrender the devices for throwing theslashing mechanism into operation inactive in case hewishes I tooperatethe starting treadle without throwing the slashing mechanism intooperation means is provided underthe control of the operator fordisconnecting the trip lever from the starting treadle.- As shown this 7of a spring 184 so that its upper hooked end will be disengaged from thetrip lever. 10 1. When the lever is in the position indicated in .Fig. 1thetrip lever is connected with'the treadle so that the slashingmechanism will be thrown into operation in starting the machine. If theoperator throws the lever down into a Vertical position the camprojection 182 will move the upper end of the rod 110 out of engagementwith the trip lever so that the treadle may be operated to start themachine without effecting the slashing mechanism. The slashing mechanismmay be rc-connected by merely throwing the lever intohorizontal'position.

In the constructionshown in Figs. 11 and 12 welt stretching devices havebeen substituted for the welt slashing devices of 8, 9 and 10. The weltstretching devices comprise a transversely slotted welt support 186 uponwhich the welt is clamped by the arms of the clamp lever and a weltpressing head 188 secured to the forwardly projecting arm of the lever62 and arranged to deflect and stretch the outer edge of the weltbetween the spaced sections of the support. The welt engaging face ofthe block is inclined transversely to the welt so that the stretching ofthe welt is the greatest at its outer edge and gradually diminishestoward its inner edge. This repeated stretching of the welt along thatportion which is to be laid about the toe of the shoe facilitates itslateral bending and attachment when this point in the seam is reached.

lVhile it is preferred to employ the specific construction andarrangement of parts shown and described in applying the invention to aninseam sewing machine of the type shown in the patent referred to itwill be understood that this construction and arrangement is notessential to the broader features of the invention and may be varied ormodified as found desirable orbest suited to the construction and modeof operation of the machine to which it is'to be applied.

What isclaimed is: 1 I 1. A machine .i'or attaching welts having, incoii'ibination, welt attaching mechanism, welt treating mechanism actingwhen thrown into operation to operate on the welt for a limited periodduring the operation of the Walt attaching mechanism and thenautomatically stop,'said welt treatingmechanism being arranged to actonthe welt at a distance from the attaching mechanism corresponding to thelength of 'welt which will be attached before reaching a sharply curvedmarginal portion of the shoe. and means act ing to render the welttreating mechanism active in starting the machine to treat the portion,of the welt to be attached to said sharply curved marginal portion ofthe shoe.

2. A machine for attaching welts having, in combination, welt attachingmechanism, welt treating mechanism arranged to act on the. welt at adistance'from the attaching mechanismcorresponding to the length of weltwhich will be attached before reaching a sharply curved marginal portionof the shoe, means acting to render the welt treating mechanism activein starting the machine to treat the portion of the welt to be attachedto said sharply curved marginal portion of the shoe, and mechanismacting during the operation of the attaching mechanism to render thewelt treating mechanism inactive on the welt after a fixed period ofoperation thereon.

3. A machine for attaching welts having, in combination, welt attachingmechanism, welt treating mechanism arranged to act on the welt at adistance from the attaching mechanism corresponding to the length ofwelt which will be attached before reaching a sharply curved marginalportion of the shoe, means acting to render the welt treating mechanismactive in starting the machine to treat the portion of the welt to beattached to said sharply curved marginal portion of the shoe, andmechanism acting to render the welt treating mechanism inactive on thewelt after a predetermined period of operation thereon adjustable tovary the period.

4:. A machine for attaching welts having, in con'ibination, weltattaching mechanism, welt treating mechanism acting when thrown intooperation to operate on the welt for a limited period during theoperation of the welt attaching mechanism and then automatically stop,said welt treating mechanism being arranged to act on the welt at adistance from the attaching mechanism corresponding to the length ofwelt which will be attached before reaching a sharply curved marginalportion of the shoe. and mechanism thrown into operation by the operatorin starting the machine and acting automatically to start the operationof the welt treating mechanism on the welt to treat the portion of thewelt to be attached to said sharply curved marginal portion of the shoe.

5. A machine for attaching welts having, in combination, welt attachingmechanism and welt treating mechanism adjustable toward and from theattaching point to act on the welt at a distance therefrom correspondingto the length of the welt which will be attached before reaching asharply curved marginal portion of the shoe, and timing devices forthrowing said welt treating mechanism out of operation at the completionof a predetermined period of operation thereon.

6. A machine for attaching welts having, in combination, welt attachingmechanism, welt treating mechanism arranged to act on the welt at adistance in advance of the attaching point corresponding to the lengthof welt which will be attached before reaching a predetermined part ofthe, work with which the-treated portion of the welt is to register, andmechanism thrown into operationhby the operator in starting the machineand acting automatically to start the operation of the welt treatingmechanism on the welt.

7. A machine for attaching welts toshoes llli having, in combination,welt attaching mechanism, mechanism for treating the portion of the weltthat is to be laid about thetoe of the shoe while the forward end of thewelt is being attached, timing device for throwing said mechanism out ofoperation at the completion of a predetermined period of operationthereof, and connections between said welt treating mechanism and thestarting mechanism of the machine to throw said welt treating mechanisminto operation.

8. A welt sewing machine having, in combination, stitch formingmechanism, mechanism for treating the portion of the welt that is to belaid about the toe of the shoe while the forward end of the welt isbeing attached, timing devices for throwing said mechanism out ofoperation at the completion of a pre determined period of operationthereof, and means for controlling thethrowing into operation of thewelt treating mechanism from the starting mechanism of the machine.

9. A machine for attaching welts to shoes having, in combination, weltattaching mech anism, welt treating mechanism for operating on theportion of the welt that is to be laid about the toe of the shoe whilethe forward end of the welt is being attached, having provision foradjustment to vary the distance from the end of the welt to the treatedportion in accordance with the length of the shoe operated upon, andmeans for controlling the throwing into operation of said welt treatingmechanism from the starting mechanism of the machine.

10. A welt sewing machine having, in combination, stitch formingmechanism, welt slashing mechanism acting when thrown into operation toslash afixed length of welt and then automatically stop, and means forcontrolling the throwing into operation of the slashing mechanism fromthe starting mechanism of the machine. 7

11. A welt sewing machine having, in combination, stitch formingmechanism, welt slashing mechanism arranged and actuated to slash onlythe portion of the welt which is to be laid aboutthe toe of the shoe,andmeans for throwing the slashing mechanism into operation in starting themachine to cause said mechanism to slash the portion of the welt whichis to be laid about the toe of the shoe.

12. A welt sewing machine having, in comthe slashing mechanism out ofoperatiomand means for throwing into operation the slashing mechanismfrom the starting mechanism of the machine. Y

13. A welt sewing machine having, in

welt guide at the sewing point, welt slashing mechanism arranged at adistance from the sewing point substantially equal to the length ofweltfrom the initial end of the seam to the toe of the shoe andadjustable toward and from the sewing point to vary said distance inaccordance with said length.

14:. A weltv sewing machine having, in combination, stitch formingmechanism, a welt guide at the sewing point, welt slashing mechanismarranged at a distance from the combination, stitch forming mechanism, a

sewing point substantially equal to the length of welt from the initialend of the seam to the toe of the shoe, and adjustable toward welttreating mechanism acting when thrown into operation to operate on thewelt for a limited period during thewelt attachingoperation and thenautomatically stop, and means which may be rendered inoperative at thewillof the operator for throwing the welt treating mechanism intooperation from the starting mechanism of the machine.

16. A machinefor acting on welts having, in combination, a welt support,a knife carrying lever, a knife mounted, onthe lever at an inclinationto the welt, and means for moving the pivot of the lever toward and awayfrom thewelt.

17. A machine for acting on welts having, in combination, awelt support,a knife carrying lever having its pivot arranged transversely of thewelt, a knife mounted on the lever at an inclination to the welt, meansfor yieldingly retaining the lever in normal position on its pivot, andmeans for moving the pivot toward: and away from the welt.

18. A machine for acting" on welts having, in combination, a weltsupport,a welt treating tool, a welt clamp, an actuator, yieldingconnections between the actuator and clamp for forcing the clamp againstthe welt, and connections between the tool and actuator for thereafteractuating the tool. I V

I JOHN B. HADAWVAY.

